You should ask this question in the street light section of this forum. But I will answer right here anyway. Yes GTE Sylvania made street lights, but mostly for the Canadian market. I do not know why they were not marketed in the USA, but Sylvania did market other types of outdoor fixtures. They made a dusk to dawn fixture similar to GE's PowrBracket. They also made large mushroom parking lot fixtures and outdoor floodlights. BTW, Sylvania's Canadian street light operations were sold to Powerlite in 1993, and in turn Powerlite was bought by T&B in 1998. Hope this helps.
Actually,they were marketed here in the US under the Regent brand.